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Anal Bioanal Chem

Title:		QCM gas phase detection with ceramic materials--VOCs and oil vapors
Author(s):		Latif U; Rohrer A; Lieberzeit PA; Dickert FL;
Address:		"Department of Analytical Chemistry, University of Vienna, Vienna, Austria"
Journal Title:		Anal Bioanal Chem
Year:		2011
Volume:		20110208
Issue:		8
Page Number:		2457 - 2462
DOI:		10.1007/s00216-011-4684-1
ISSN/ISBN:		1618-2650 (Electronic) 1618-2642 (Linking)
Abstract:		"Titanate sol-gel layers imprinted with carbonic acids were used as sensitive layers on quartz crystal microbalance. These functionalized ceramics enable us detection of volatile organic compounds such as ethanol, n-propanol, n-butanol, n-hexane, n-heptane, n-/iso-octane, and n-decane. Variation of the precursors (i.e., tetrabutoxy titanium, tetrapropoxy titanium, tetraethoxy titanium) allows us to tune the sensitivity of the material by a factor of 7. Sensitivity as a function of precursors leads to selective inclusion of n-butanol vapors down to 1 ppm. The selectivity of materials is optimized to differentiate between isomers, e.g., n- and iso-octane. The results can be rationalized by correlating the sensor effects of hydrocarbons with the Wiener index. A mass-sensitive sensor based on titanate layer was also developed for monitoring emanation of degraded engine oil. Heating the sensor by a meander avoids vapor condensation. Thus, a continuously working oil quality sensor was designed"
Keywords:
Notes:		"PubMed-not-MEDLINELatif, Usman Rohrer, Andreas Lieberzeit, Peter A Dickert, Franz L eng Germany 2011/02/09 Anal Bioanal Chem. 2011 Jun; 400(8):2457-62. doi: 10.1007/s00216-011-4684-1. Epub 2011 Feb 8"